| Lutetian | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 48.07 – 41.03Ma | |||||||||||||
| Chronology | |||||||||||||
| |||||||||||||
| Formerly part of | TertiaryPeriod/System | ||||||||||||
| Etymology | |||||||||||||
| Name formality | Formal | ||||||||||||
| Usage information | |||||||||||||
| Celestial body | Earth | ||||||||||||
| Regional usage | Global (ICS) | ||||||||||||
| Time scale(s) used | ICS Time Scale | ||||||||||||
| Definition | |||||||||||||
| Chronological unit | Age | ||||||||||||
| Stratigraphic unit | Stage | ||||||||||||
| Time span formality | Formal | ||||||||||||
| Lower boundary definition | FAD of the calcareous nannofossilBlackites inflatus | ||||||||||||
| Lower boundary GSSP | Gorrondatxe section,Western Pyrenees,Basque Country,Spain 43°22′47″N3°00′51″W / 43.3796°N 3.0143°W /43.3796; -3.0143 | ||||||||||||
| Lower GSSP ratified | April 2011[3] | ||||||||||||
| Upper boundary definition | Not formally defined | ||||||||||||
| Upper boundary definition candidates | Calcareous nannofossil nearLAD of theHaptophyteReticulofenestra reticulata | ||||||||||||
| Upper boundary GSSP candidate section(s) | Contessa highway section,Gubbio,Central Apennines,Italy | ||||||||||||
TheLutetian is, in thegeologic timescale, astage orage in theEocene.[4] It spans the time between48.07 and41.03 Ma. The Lutetian is preceded by theYpresian and is followed by the Bartonian.[5] Together with theBartonian it is sometimes referred to as the Middle Eocene Subepoch.
The Lutetian was named afterLutetia, theLatin name for the city ofParis. The Lutetian Stage was introduced in scientific literature by French geologistAlbert de Lapparent in 1883[6] and revised by A. Blondeau in 1981.[7]
The base of the Lutetian Stage is at the first appearance of the nanofossilBlackites inflatus, according to an official reference profile (GSSP) established in 2011.[8] Of two candidates located inSpain, the Gorrondatxe section was chosen.[9]
The top of the Lutetian (the base of the Bartonian) is at the first appearance ofcalcareous nanoplankton speciesReticulofenestra reticulata.
The Lutetian overlaps with theGeiseltalian and lower RobiacianEuropean Land Mammal Mega Zones (The Lutetian Stage spans theMammal Paleogene zones 11 through 15.[10]), the upperBridgerian andUintanNorth American Land Mammal Ages, the upperArshantan andIrdinmanhanAsian Land Mammal Ages, and theMustersan and lowerDivisaderanSouth American Land Mammal Ages. It is also coeval with the middle Johannian regional stage ofAustralia and the upper Ulatisian and lower Nanzian regional stages ofCalifornia.